body {
    font: 16px/1.6 -apple-system, BlinkMacSystemFont, sans-serif;
    max-width: 640px;
    margin: 3em auto;
    padding: 0 1em;
    color: #1a1a1a;
}

h1 {
    text-align: center;
    line-height: 1.3em;
    font-size: 3em;
    font-weight: 700;
    margin-bottom: 0.3em;
}

.ico {
    font-size: 1.4em;
    vertical-align: -0.08em;
    margin-right: 0.05em;
}

code {
    background: #f4f4f5;
    padding: 0.1em 0.35em;
    border-radius: 3px;
    font-size: 0.95em;
}

ul {
    padding-left: 1.2em;
}

li {
    margin: 0.5em 0;
}

a {
    color: #2563eb;
}

h2 {
    font-size: 1.1em;
    margin-top: 2em;
}

h2 a {
    color: inherit;
    text-decoration: none;
}

h2 a:hover {
    text-decoration: underline;
}

pre {
    background: #f4f4f5;
    padding: 0.8em 1em;
    border-radius: 4px;
    overflow-x: auto;
    font-size: 0.9em;
    line-height: 1.4;
}

pre code {
    background: transparent;
    padding: 0;
    font-size: inherit;
}

small {
    color: #666;
}